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iio: imu: kmx61: Add acpi support

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Signed-off-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Daniel Baluta 2014-12-03 15:31:49 +02:00 committed by Jonathan Cameron
parent 20ffac278e
commit b25862c577
1 changed files with 59 additions and 0 deletions
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59
drivers/iio/imu/kmx61.c
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@ -13,10 +13,13 @@
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/acpi.h>
#include <linux/gpio/consumer.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#define KMX61_DRV_NAME "kmx61"
#define KMX61_GPIO_NAME "kmx61_int"
#define KMX61_REG_WHO_AM_I 0x00
@ -573,6 +576,44 @@ static const struct iio_info kmx61_mag_info = {
.attrs = &kmx61_mag_attribute_group,
};
static const char *kmx61_match_acpi_device(struct device *dev)
{
const struct acpi_device_id *id;
id = acpi_match_device(dev->driver->acpi_match_table, dev);
if (!id)
return NULL;
return dev_name(dev);
}
static int kmx61_gpio_probe(struct i2c_client *client, struct kmx61_data *data)
{
struct device *dev;
struct gpio_desc *gpio;
int ret;
if (!client)
return -EINVAL;
dev = &client->dev;
/* data ready gpio interrupt pin */
gpio = devm_gpiod_get_index(dev, KMX61_GPIO_NAME, 0);
if (IS_ERR(gpio)) {
dev_err(dev, "acpi gpio get index failed\n");
return PTR_ERR(gpio);
}
ret = gpiod_direction_input(gpio);
if (ret)
return ret;
ret = gpiod_to_irq(gpio);
dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
return ret;
}
static struct iio_dev *kmx61_indiodev_setup(struct kmx61_data *data,
const struct iio_info *info,
const struct iio_chan_spec *chan,
@ -613,6 +654,13 @@ static int kmx61_probe(struct i2c_client *client,
mutex_init(&data->lock);
if (id)
name = id->name;
else if (ACPI_HANDLE(&client->dev))
name = kmx61_match_acpi_device(&client->dev);
else
return -ENODEV;
data->acc_indio_dev =
kmx61_indiodev_setup(data, &kmx61_acc_info,
kmx61_acc_channels,
@ -633,6 +681,9 @@ static int kmx61_probe(struct i2c_client *client,
if (ret < 0)
return ret;
if (client->irq < 0)
client->irq = kmx61_gpio_probe(client, data);
ret = iio_device_register(data->acc_indio_dev);
if (ret < 0) {
dev_err(&client->dev, "Failed to register acc iio device\n");
@ -668,6 +719,13 @@ static int kmx61_remove(struct i2c_client *client)
return 0;
}
static const struct acpi_device_id kmx61_acpi_match[] = {
{"KMX61021", 0},
{}
};
MODULE_DEVICE_TABLE(acpi, kmx61_acpi_match);
static const struct i2c_device_id kmx61_id[] = {
{"kmx611021", 0},
{}
@ -678,6 +736,7 @@ MODULE_DEVICE_TABLE(i2c, kmx61_id);
static struct i2c_driver kmx61_driver = {
.driver = {
.name = KMX61_DRV_NAME,
.acpi_match_table = ACPI_PTR(kmx61_acpi_match),
},
.probe = kmx61_probe,
.remove = kmx61_remove,